Thermal Circuit Breaker Circuit Breaker 503

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Part	Manufacturer	Circuit Protection Type	Mounting Feature	Rated AC Voltage	Rated DC Voltage	Rated Current	Terminal Shape	Minimum Operating Temperature	Terminal Finish	Rated Breaking Capacity	Manufacturer Series	Trip Time/Delay	Additional Features	Actuator Type	Packing Method	Body Length/Diameter	Body Width	Environmental Characteristics	JESD-609 Code	Dimensions	Circuit Function	Body Height	Reference Standard	No. of Poles	Maximum Operating Temperature
W28-XQ1A-8	TE Connectivity	Thermal Circuit Breaker	Panel Mount	250 V	32 V	8 A	Quick Connect			1 kA		2.2 s		Push To Reset		0.625 in (15.88 mm)	0.54 in (13.72 mm)			0.625 x 0.54 x 1.535 in (15.88 x 13.72 x 38.99 mm)	Series Trip	1.535 in (38.99 mm)	CSA; UL; VDE	1
420362	Legrand	Thermal Circuit Breaker	DIN Rail Mount	400 V		40 A	Snap On	-25 °C (-13 °F)		50 kA				Handle	Bulk	6.496 in (165 mm)	4.134 in (105 mm)				Trip	3.937 in (100 mm)	IEC	3	70 °C (158 °F)
W28-XQ1A-20	TE Connectivity	Thermal Circuit Breaker	Panel Mount	250 V	32 V	20 A	Quick Connect			1 kA		2.2 s		Push To Reset		0.625 in (15.88 mm)	0.54 in (13.72 mm)			0.625 x 0.54 x 1.535 in (15.88 x 13.72 x 38.99 mm)	Series Trip	1.535 in (38.99 mm)	CSA; SEV; UL; VDE	1
W28-XQ1A20	TE Connectivity	Thermal Circuit Breaker	Panel Mount	250 V	32 V	20 A	Quick Connect					2.2 s		Push To Reset							Series Trip			1
W28XQ1A20	TE Connectivity	Thermal Circuit Breaker	Panel Mount	250 V	32 V	20 A	Quick Connect					2.2 s		Push To Reset							Series Trip			1
CTB-B-B-05	Carling Technologies	Thermal Circuit Breaker	Panel Mount	250 V	50 V	5 A	Quick Connect			1 kA				Rocker		0.76 in (19.31 mm)	0.76 in (19.31 mm)				Series Trip	1.535 in (38.99 mm)	CE; CUL; UL; VDE	1
MS3320-1	Defense Logistics Agency	Thermal Circuit Breaker	Panel Mount	120 V	28 V	1 A	Screw	-55 °C (-67 °F)		3.5 kA			Rated breaking capacity at 28 VDC: 6000 A	Push-Pull		0.781 in (19.84 mm)	0.593 in (15.06 mm)	Corrosion Resistant; Moisture Resistant		0.781 x 0.593 x 1.03 in (19.84 x 15.06 x 26.16 mm)	Trip Free	1.03 in (26.16 mm)	MIL-C-5809	1	121 °C (249.8 °F)
MS3320-20	Defense Logistics Agency	Thermal Circuit Breaker	Panel Mount	120 V	28 V	20 A	Screw	-55 °C (-67 °F)		2 kA			Rated breaking capacity at 28 VDC: 6000 A	Push-Pull		0.781 in (19.84 mm)	0.593 in (15.06 mm)	Corrosion Resistant; Moisture Resistant		0.781 x 0.593 x 1.03 in (19.84 x 15.06 x 26.16 mm)	Trip Free	1.03 in (26.16 mm)	MIL-C-5809	1	121 °C (249.8 °F)
W28-XQ1A-12	TE Connectivity	Thermal Circuit Breaker	Panel Mount	250 V	32 V	12 A	Quick Connect			1 kA		2.2 s		Push To Reset		0.625 in (15.88 mm)	0.54 in (13.72 mm)			0.625 x 0.54 x 1.535 in (15.88 x 13.72 x 38.99 mm)	Series Trip	1.535 in (38.99 mm)	CSA; UL; VDE	1
W28-XQ1A12	TE Connectivity	Thermal Circuit Breaker	Panel Mount	250 V	32 V	12 A	Quick Connect					2.2 s		Push To Reset							Series Trip			1
W28XQ1A12	TE Connectivity	Thermal Circuit Breaker	Panel Mount	250 V	32 V	12 A	Quick Connect					2.2 s		Push To Reset							Series Trip			1
3VA2340-5HL32-0AA0	Siemens	Thermal Circuit Breaker	Panel Mount	690 V		400 A	Screw	-25 °C (-13 °F)		55 kA				Toggle		9.8 in (248.92 mm)	5.4 in (137.16 mm)	IP40		9.8 x 5.4 x 4.3 in (248.92 x 137.16 x 109.22 mm)	Trip	4.3 in (109.22 mm)		3	70 °C (158 °F)
5SY4110-7	Siemens	Thermal Circuit Breaker	DIN Rail Mount	400 V		10 A	Snap On	-25 °C (-13 °F)		5 kA	5SY4110-7		Environmental Characteristics: IP20; Sealed			3.535 in (89.8 mm)	0.693 in (17.6 mm)	Environment/Moisture Resistant		3.535 x 0.693 x 2.764 in (89.8 x 17.6 x 70.2 mm)	Trip	2.764 in (70.2 mm)	CE; EAC; IMQ; KTL; UL; VDE	1	55 °C (131 °F)
1620-2-10A	E-t-a Elektrotechnische Apparate	Thermal Circuit Breaker	Panel Mount		12 V	10 A	Quick Connect	-40 °C (-40 °F)		150 A				Modified Reset		0.524 in (13.3 mm)	0.276 in (7 mm)	Corrosion Resistant; IP00; IP50			Trip	0.984 in (25 mm)		1	85 °C (185 °F)
2TC2-20	Texas Instruments	Thermal Circuit Breaker	Panel Mount	120 V	28 V	20 A	Screw			2 kA	2TC2			Push-Pull		0.781 in (19.84 mm)	0.593 in (15.06 mm)	Corrosion Resistant		0.781 x 0.593 x 1.03 in (19.84 x 15.06 x 26.16 mm)		1.03 in (26.16 mm)
W23-X1A1G-5	TE Connectivity	Thermal Circuit Breaker	Panel Mount	240 V	50 V	5 A	Screw			1 kA		6 s		Push-Pull		1.384 in (35.15 mm)	0.69 in (17.53 mm)	Corrosion/Environment/Moisture Resistant			Series Trip	1.6 in (40.64 mm)	CSA; UL	1
MS3320-10L	Eaton Corporation	Thermal Circuit Breaker	Panel Mount	120 V	28 V	10 A	Screw	-55 °C (-67 °F)		3.5 kA			Standard: MIL-C-5809, rated breaking capacity at 28 VDC: 6000 A	Push Button		0.781 in (19.84 mm)	0.593 in (15.06 mm)	Corrosion Resistant; Moisture Resistant		0.781 x 0.593 x 1.03 in (19.84 x 15.06 x 26.16 mm)	Trip	1.03 in (26.16 mm)		1	121 °C (249.8 °F)
MS3320-7-1/2	Eaton Corporation	Thermal Circuit Breaker	Panel Mount	120 V	28 V	7.5 A	Screw	-55 °C (-67 °F)		3.5 kA			Standard: MIL-C-5809, rated breaking capacity at 28 VDC: 6000 A	Push Button		0.781 in (19.84 mm)	0.593 in (15.06 mm)	Corrosion Resistant; Moisture Resistant		0.781 x 0.593 x 1.03 in (19.84 x 15.06 x 26.16 mm)	Trip	1.03 in (26.16 mm)		1	121 °C (249.8 °F)
MS3320-2	Defense Logistics Agency	Thermal Circuit Breaker	Panel Mount	120 V	28 V	2 A	Screw	-55 °C (-67 °F)		2.8 kA			Rated breaking capacity at 28 VDC: 6000 A	Push-Pull		0.781 in (19.84 mm)	0.593 in (15.06 mm)	Corrosion Resistant; Moisture Resistant		0.781 x 0.593 x 1.03 in (19.84 x 15.06 x 26.16 mm)	Trip Free	1.03 in (26.16 mm)	MIL-C-5809	1	121 °C (249.8 °F)
W33-T4B1Q-5	TE Connectivity	Thermal Circuit Breaker	Panel Mount	250 V	50 V	5 A	Quick Connect			1 kA		3 s		Rocker		1.89 in (48.01 mm)	0.98 in (24.89 mm)				Series Trip	1.724 in (43.79 mm)		2
2TC2-2	Texas Instruments	Thermal Circuit Breaker	Panel Mount	120 V	28 V	2 A	Screw			2.8 kA	2TC2			Push-Pull		0.781 in (19.84 mm)	0.593 in (15.06 mm)	Corrosion Resistant		0.781 x 0.593 x 1.03 in (19.84 x 15.06 x 26.16 mm)		1.03 in (26.16 mm)
3120-N321-P7T1-W19DG4-10A	E-t-a Elektrotechnische Apparate	Thermal Circuit Breaker	Panel Mount	240 V	50 V	10 A	Quick Connect	-30 °C (-22 °F)		5 kA			Rated breaking capacity at 50 VDC: 1000 A	Rocker				Corrosion/Moisture Resistant; IP00; IP40			Manual On/Off		CCC; CE; CSA; CQC; KTL; UL; VDE	2	60 °C (140 °F)
W31-X2M1G-15	TE Connectivity	Thermal Circuit Breaker	Panel Mount	240 V	50 V	15 A	Screw			1 kA		6 s		Toggle		1.384 in (35.15 mm)	0.69 in (17.53 mm)	Corrosion/Environment/Moisture Resistant			Series Trip	1.6 in (40.64 mm)	CSA; UL	1
MS3320-20V	Eaton Corporation	Thermal Circuit Breaker	Panel Mount	120 V	28 V	20 A	Screw	-55 °C (-67 °F)		3.5 kA			Standard: MIL-C-5809, rated breaking capacity at 28 VDC: 6000 A	Push Button		0.781 in (19.84 mm)	0.593 in (15.06 mm)	Corrosion Resistant; Moisture Resistant		0.781 x 0.593 x 1.03 in (19.84 x 15.06 x 26.16 mm)	Trip	1.03 in (26.16 mm)		1	121 °C (249.8 °F)
4435.0013	Schurter Ag	Thermal Circuit Breaker	Panel Mount	240 V	60 V	20 A	Quick Connect	-30 °C (-22 °F)		2 kA				Rocker	Bulk	1.417 in (36 mm)	1.142 in (29 mm)	IP40			Trip Free	1.736 in (44.1 mm)	CCC; CSA; GB; IEC; UL; VDE	2	60 °C (140 °F)
1610-21-5A	E-t-a Elektrotechnische Apparate	Thermal Circuit Breaker	Inline/Holder		24 V	5 A	Tab/Blade	-40 °C (-40 °F)		150 A				Push To Reset		0.787 in (20 mm)	0.236 in (6 mm)	Corrosion/Moisture Resistant; IP00; IP30			Trip Free	0.945 in (24 mm)	UL	1	85 °C (185 °F)
2909902	Phoenix Contact	Thermal Circuit Breaker
W28-XQ1A-5	TE Connectivity	Thermal Circuit Breaker	Panel Mount	250 V	32 V	5 A	Quick Connect			1 kA		2.2 s		Push To Reset		0.76 in (19.31 mm)	0.76 in (19.31 mm)			0.625 x 0.54 x 1.535 in (15.88 x 13.72 x 38.99 mm)	Series Trip	1.535 in (38.99 mm)	CSA; UL; VDE	1
MS25244-10	Sensata Technologies	Thermal Circuit Breaker	Panel Mount	120 V	30 V	10 A	Screw			3.5 kA		1 s	Rated breaking capacity at 30 VDC: 6000 A	Push-Pull		1.094 in (27.79 mm)	0.75 in (19.05 mm)	Corrosion/Moisture Resistant		1.094 x 0.75 x 1.49 in (27.79 x 19.05 x 37.85 mm)	Trip Free	1.49 in (37.85 mm)		1
W33-S4B1Q-5	TE Connectivity	Thermal Circuit Breaker	Panel Mount	250 V	50 V	5 A	Quick Connect			1 kA		3 s		Rocker		1.89 in (48.01 mm)	0.98 in (24.89 mm)				Series Trip	1.724 in (43.79 mm)		2
W58-XB1A4A-5	TE Connectivity	Thermal Circuit Breaker	Panel Mount	250 V	50 V	5 A	Quick Connect			1 kA		6 s	Rated breaking capacity at 50 VDC: 2000 A	Push To Reset						1.375 x 0.66 x 1.375 in (34.93 x 16.76 x 34.93 mm)	Series Trip			1
2TC2-1	Texas Instruments	Thermal Circuit Breaker	Panel Mount	120 V	28 V	1 A	Screw			3.5 kA	2TC2			Push-Pull		0.781 in (19.84 mm)	0.593 in (15.06 mm)	Corrosion Resistant		0.781 x 0.593 x 1.03 in (19.84 x 15.06 x 26.16 mm)		1.03 in (26.16 mm)
4404.0022	Schurter Ag	Thermal Circuit Breaker	Panel Mount	240 V	48 V	10 A	Quick Connect	-5 °C (23 °F)	Tin Silver	2 kA				Reset Type	Bulk	0.748 in (19 mm)	0.748 in (19 mm)	IP40	e2		Manual On/Off	1.421 in (36.1 mm)	CCC; CSA; UL; GB; IEC; UL; VDE	1	60 °C (140 °F)
4435.0002	Schurter Ag	Thermal Circuit Breaker	Panel Mount	240 V	60 V	20 A	Quick Connect	-30 °C (-22 °F)		2 kA				Rocker	Bulk	1.417 in (36 mm)	1.142 in (29 mm)	IP40			Trip Free	1.736 in (44.1 mm)	CCC; CSA; GB; IEC; UL; VDE	2	60 °C (140 °F)
1135753	Phoenix Contact	Thermal Circuit Breaker
1620-2-5A	E-t-a Elektrotechnische Apparate	Thermal Circuit Breaker	Panel Mount		12 V	5 A	Quick Connect	-40 °C (-40 °F)		150 A				Modified Reset		0.524 in (13.3 mm)	0.276 in (7 mm)	Corrosion Resistant; IP00; IP50			Trip	0.984 in (25 mm)		1	85 °C (185 °F)
5SY6114-7	Siemens	Thermal Circuit Breaker	DIN Rail Mount	400 V	60 V	14 A	Snap On	-25 °C (-13 °F)		5 kA				Toggle	Bulk	3.543 in (90 mm)	0.709 in (18 mm)	IP20			Trip	2.992 in (76 mm)	CSA; EN; UL	1	55 °C (131 °F)
CMB-053-27G3N-B-A	Carling Technologies	Thermal Circuit Breaker	Panel Mount	250 V	32 V	5 A	Quick Connect	-10 °C (14 °F)		1 kA				Push To Reset		1.154 in (29.3 mm)	0.551 in (14 mm)				Series Trip	1.78 in (45.2 mm)	CSA; CE; CUL; TUV; UL	1	60 °C (140 °F)
MS14154-7-1/2	Sensata Technologies	Thermal Circuit Breaker	Panel Mount-Threaded	120 V		7.5 A	Screw			2 kA				Push-Pull		1.84 in (46.74 mm)	0.781 in (19.84 mm)	Corrosion Resistant		1.84 x 0.781 x 1.381 in (46.74 x 19.84 x 35.08 mm)	Trip Free	1.381 in (35.08 mm)		1
1110-F112-P1M1-5A	E-t-a Elektrotechnische Apparate	Thermal Circuit Breaker	Panel Mount	250 V	50 V	5 A	Quick Connect	-20 °C (-4 °F)		40 A			Rated breaking capacity at 50 VDC: 50 A	Push Button		0.748 in (19 mm)	0.748 in (19 mm)	Corrosion Resistant; IP00; IP40; IP64			Tease-Free And Trip-Free	2.008 in (51 mm)	CSA; CUL; EN; UL; VDE	1	60 °C (140 °F)
MS14154-10	Defense Logistics Agency	Thermal Circuit Breaker	Panel Mount-Threaded			10 A	Screw	-55 °C (-67 °F)						Push-Pull		1.84 in (46.74 mm)	0.781 in (19.84 mm)			1.84 x 0.781 x 1.381 in (46.74 x 19.84 x 35.08 mm)	Trip Free	1.381 in (35.08 mm)	MIL-C-5809	3	71 °C (159.8 °F)
2TC2-25	Texas Instruments	Thermal Circuit Breaker	Panel Mount	120 V	28 V	25 A	Screw			1.8 kA	2TC2			Push-Pull		0.781 in (19.84 mm)	0.593 in (15.06 mm)	Corrosion Resistant		0.781 x 0.593 x 1.03 in (19.84 x 15.06 x 26.16 mm)		1.03 in (26.16 mm)
3120-N321-P7T1-W19DG4-20A	E-t-a Elektrotechnische Apparate	Thermal Circuit Breaker	Panel Mount	240 V	50 V	20 A	Quick Connect	-30 °C (-22 °F)		5 kA			Rated breaking capacity at 50 VDC: 1000 A	Rocker				Corrosion/Moisture Resistant; IP00; IP40			Manual On/Off		CCC; CE; CSA; CQC; KTL; UL; VDE	2	60 °C (140 °F)
3120-N321-P7T1-W19DG4-5A	E-t-a Elektrotechnische Apparate	Thermal Circuit Breaker	Panel Mount	240 V	50 V	5 A	Quick Connect	-30 °C (-22 °F)		5 kA			Rated breaking capacity at 50 VDC: 1000 A	Rocker				Corrosion/Moisture Resistant; IP00; IP40			Manual On/Off		CCC; CE; CSA; CQC; KTL; UL; VDE	2	60 °C (140 °F)
3TC7-10	Sensata Technologies	Thermal Circuit Breaker									3TC7
3120-N321-P7T1-W19DG4-15A	E-t-a Elektrotechnische Apparate	Thermal Circuit Breaker	Panel Mount	240 V	50 V	15 A	Quick Connect	-30 °C (-22 °F)		5 kA			Rated breaking capacity at 50 VDC: 1000 A	Rocker				Corrosion/Moisture Resistant; IP00; IP40			Manual On/Off		CCC; CE; CSA; CQC; KTL; UL; VDE	2	60 °C (140 °F)
0712217	Phoenix Contact	Thermal Circuit Breaker	Panel Mount	250 V	65 V	2 A	Quick Connect	-20 °C (-4 °F)		12 A				Push To Reset	Bulk	0.961 in (24.4 mm)	0.323 in (8.2 mm)	IP40			Trip	1.752 in (44.5 mm)	CCC; CSA; CUL; EAC; UL; VDE	1	60 °C (140 °F)
1410-L210-L2F1-S02-5A	E-t-a Elektrotechnische Apparate	Thermal Circuit Breaker	Through Hole Mount	240 V	28 V	5 A	Printed Circuit Board	-20 °C (-4 °F)	Silver	2 kA			Rated breaking capacity at 50 VDC: 200 A	Reset Slide		1.102 in (28 mm)	0.354 in (9 mm)	Corrosion Resistant	e4	1.102 x 0.354 x 0.425 in (28 x 9 x 10.8 mm)		0.425 in (10.8 mm)	CSA; UL; VDE	1	70 °C (158 °F)

Circuit Breaker

A circuit breaker is an automatic electrical switch that is designed to protect an electrical circuit from damage caused by overcurrent or short circuits. Circuit breakers are commonly used in residential, commercial, and industrial electrical systems, and they are an important safety device that helps prevent electrical fires, equipment damage, and personal injury.

Circuit breakers work by monitoring the amount of current flowing through an electrical circuit. If the current exceeds a preset level, the circuit breaker will trip, or open the circuit, to prevent damage to the electrical system. When the circuit breaker trips, it interrupts the flow of current, which stops the electrical current from flowing and prevents further damage.

Circuit breakers are available in a variety of types and sizes, and they can be classified based on their voltage rating, current rating, and interrupting capacity. Some common types of circuit breakers include thermal circuit breakers, magnetic circuit breakers, and hybrid circuit breakers.

In addition to protecting electrical systems from overcurrent and short circuits, circuit breakers also help improve the reliability and efficiency of electrical systems. They can also be used to switch electrical circuits on and off, which can be helpful in certain applications.